Advanced Troubleshooting Guide for Air Brake Compressors

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*This Guide is only for vehicles that use desiccant air Guide consists of an introduction to air Brake charging systemcomponents, a table showing recommended vehicle maintenanceschedules, and a Troubleshooting symptom and remedy section with teststo diagnose most charging system Troubleshooting Guidefor Air Brake Compressors *This Troubleshooting Guide obsoletes and supersedes all previous publishedtroubleshooting information relative to bendix air Brake charging system:Slow build ( ) . . . . . . . . . . . . . . . . . . 9 - 10Doesn t build air ( ) . . . . . . . . . . . . . . . 11Air dryer:Doesn t purge ( ) . . . . . . . . . . . . . . . . . 12Safety valve releases air ( ) . . . . . . . . . 12Compressor:Constantly cycles ( ).

how to help prevent discharge line freeze-ups, see Bendix Bulletins TCH-08-21 and TCH-08-22 (see pages 20-22). Shorter discharge line lengths or insulation may be required in cold climates. The air dryer contains a filter that collects oil droplets, and a desiccant bed that removes almost all of the remaining water vapor. The compressed air is then

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